To set up the "blend" functions if a Program has .blendEnabled.
Program
.blendEnabled
@:value(0)staticinlineread onlyADD:Int = 0
@:value(1)staticinlineread onlySUBTRACT:Int = 1
@:value(2)staticinlineread onlyREVERSE_SUBTRACT:Int = 2
@:value(3)staticinlineread onlyMIN:Int = 3
@:value(4)staticinlineread onlyMAX:Int = 4